linux-kernel - Re: [PATCH v1 01/24] psci: Accessor for configured PSCI version

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Date:   Wed, 11 Nov 2020 11:31:47 +0000
From:   David Brazdil <dbrazdil@...gle.com>
To:     Marc Zyngier <maz@...nel.org>
Cc:     kvmarm@...ts.cs.columbia.edu, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Dennis Zhou <dennis@...nel.org>,
        Tejun Heo <tj@...nel.org>, Christoph Lameter <cl@...ux.com>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Quentin Perret <qperret@...gle.com>,
        Andrew Scull <ascull@...gle.com>,
        Andrew Walbran <qwandor@...gle.com>, kernel-team@...roid.com
Subject: Re: [PATCH v1 01/24] psci: Accessor for configured PSCI version

> > +
> >  struct psci_operations {
> >  	u32 (*get_version)(void);
> >  	int (*cpu_suspend)(u32 state, unsigned long entry_point);
> 
> I still maintain that populating .get_version in all cases instead of
> duplicating an existing functionality is a better outcome. PSCI not
> supported would be implied by .get_version being NULL.
> 
> What breaks?

Must have missed that suggestion before. Good idea, I'll do that.